convert_energy
Convert energy values between units like joules, kilowatt-hours, BTUs, and calories using the Unit Converter MCP server.
Instructions
Convert energy between units.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| value | Yes | Energy value to convert | |
| from_unit | Yes | Source unit | |
| to_unit | Yes | Target unit |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Implementation Reference
- src/unit_converter_mcp/server.py:113-127 (handler)MCP handler for the 'convert_energy' tool using @app.tool() decorator. Validates inputs with ENERGY_UNIT types, delegates to convert_energy_tool, and returns a structured dictionary response.
@app.tool() def convert_energy( value: Annotated[float, Field(description="Energy value to convert")], from_unit: Annotated[ENERGY_UNIT, Field(description="Source unit")], to_unit: Annotated[ENERGY_UNIT, Field(description="Target unit")], ) -> dict: """Convert energy between units.""" converted_value = convert_energy_tool(value, from_unit, to_unit) return { "original_value": value, "original_unit": from_unit, "converted_value": converted_value, "converted_unit": to_unit, "conversion_type": "energy", } - Pydantic/Literal type definition for all supported energy units, used for input validation in the handler.
ENERGY_UNIT = Literal[ "joule", "kilojoule", "megajoule", "gigajoule", "terajoule", "petajoule", "exajoule", "watt hour", "kilowatt hour", "megawatt hour", "gigawatt hour", "terawatt hour", "Btu", "calorie", "kilocalorie", "therm", "foot‑pound force", "inch‑pound force", "erg", "electron volt", ] - Core helper function implementing energy unit conversion by normalizing to joules using predefined conversion factors from each unit to joules.
def convert_energy_tool( value: float, from_unit: ENERGY_UNIT, to_unit: ENERGY_UNIT, ) -> float: """Convert energy between units.""" # Convert to joules first to_joules = { # SI and metric prefixes "joule": 1.0, "kilojoule": 1_000.0, "megajoule": 1_000_000.0, "gigajoule": 1_000_000_000.0, "terajoule": 1_000_000_000_000.0, "petajoule": 1_000_000_000_000_000.0, "exajoule": 1_000_000_000_000_000_000.0, # Electrical‑energy units "watt hour": 3_600.0, "kilowatt hour": 3_600_000.0, "megawatt hour": 3_600_000_000.0, "gigawatt hour": 3_600_000_000_000.0, "terawatt hour": 3_600_000_000_000_000.0, # Heat / nutrition "Btu": 1_054.35, "calorie": 4.184, "kilocalorie": 4_184.0, "therm": 105_505_585.257348, # Mechanical & particle‑physics units "foot‑pound force": 1.355_817_948_331, "inch‑pound force": 0.112_984_829_028, "erg": 1e-7, "electron volt": 1.602_176_634e-19, } joules = value * to_joules[from_unit] return joules / to_joules[to_unit]